MCB 1P D-Curve, 6kA

CHINT NXB-63G-1P-D – 1-Pole D-Curve Miniature Circuit Breaker

The CHINT NXB-63G-1P-D is a single-pole miniature circuit breaker designed for circuits with high inrush currents. With its D-curve tripping characteristics, it provides reliable protection for equipment that draws a strong initial surge, such as transformers, motors, compressors and certain power electronics.

Key Features

• 1-pole design for compact single-phase circuit protection.
• D-curve tripping – ideal for loads with high inrush currents and demanding startup profiles.
• Thermal-magnetic trip mechanism for accurate overload and short-circuit protection.
• DIN-rail mounted for fast, clean installation in any DB board.
• Clear ON/OFF indication and robust toggle mechanism.
• Durable, long-life housing designed for residential, commercial and industrial use.

Typical Applications

• Motors, pumps, compressors and machinery with strong startup surges.
• Transformers and inductive loads.
• Inverter systems, UPS units and power electronics.
• Commercial and industrial DB boards.
• Specialised equipment requiring D-curve protection characteristics.

Installation Notes

• Install on a standard 35 mm DIN rail inside a compliant enclosure.
• Confirm correct line and load orientation before wiring.
• Use appropriately sized conductors and follow manufacturer torque specifications.
• Coordinate with upstream and downstream protection devices for proper selectivity.

The NXB-63G-1P-D is the ideal choice for circuits that demand the robust performance of a D-curve breaker, offering reliable protection and professional-grade durability for advanced electrical installations.